MicroTCA at FNAL
This presentation provides an overview of the ongoing MicroTCA-related work at Fermilab.
Case, Jennifer↗
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FNAL-NIU collaboration on magnet development
We are presenting an overview of our (MTD) collaboration with NIU on superconducting magnet development. Through multiple endeavors over the last years we succeeded building a strong collaboration and attracted additional support for it. One of the key aspects of the collaboration is that it heavily benefits NIU students who are offered excellent opportunities to work with world leading experts in the field, make a mark for themselves and possibly start a carrier in an area they start to appreciate and like.
Stoynev, Stoyan [Fermilab]↗
Lessons from Testing the First Three US HL-LHC Cryo-Assemblies at FNAL
The US High-Luminosity LHC Accelerator Upgrade Project (AUP) collaborates with CERN to deliver 10 cryo-assemblies for the High-Luminosity LHC upgrade at CERN. Those comprise the Q1/Q3 quadrupole optical elements in the accelerator and are based on Nb3Sn technology, for the first time in a large particle accelerator. So far three cryo-assemblies were tested at the Fermilab’s horizontal magnet test facility, specifically redesigned to serve those needs. This work gives an overview of the facility and its necessary evolution as the campaign progressed; main results and observations from the cryo-assembly tests are presented and discussed in the context of overall performance and expectations toward the completion of efforts. Lessons learned after multiple cryo-assembly tests by the same team are critical to ensure continuous success of the whole enterprise – those are openly shared.
Stoynev, Stoyan [Fermilab]↗
High-Q/high-G Developments at FNAL
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Bafia, Daniel [Fermilab]↗
US HL-LHC cryo-assemblies at FNAL - testing and lessons learned
The U.S. High-Luminosity LHC Accelerator Upgrade Project (AUP) is fabricating ten cryogenic assemblies for the HL-LHC Q1/Q3 quadrupole optics at CERN, each integrating two Nb_{3}Sn-based magnets. Fermilab has tested three assemblies (LQXFA/B01–03) at its upgraded horizontal test stand under 1.9 K conditions. Overview of the test stand and the cryo-assembly tests is given along with main results. Challenges met and lessons learned are discussed. Successful testing validates the design and integration of U.S.-produced cryo-assemblies, keeping the project on track for timely delivery to CERN.
Stoynev, Stoyan [Fermilab] (ORCID:0000000345637702↗
Optics Reconstruction in the SCL Section of the FNAL Linac
The Side-CoupledLinac (SCL) section oftheFNAL linac acceleratesthe beamfrom 117 MeV to 401.5 MeV, operatingat 22-24mA beam current. Transverse focusing is performedby32 quadrupoles, and the beam orbit is guidedby19dipolecorrectors andmeasuredby29 BPMs. The bunch length is measured in a single location by a Bunch Shape Monitor (BSM). This paper presents a three-step reconstruction of the machine optics. First, the transverse and longitudinal Twiss parameters at the start of the SCL section are determined using quadrupole scans and BSM measurements at different settings o fan upstream cavity. Second, the quadrupole calibrations are adjusted based on differential-trajectory measurements. Finally, the beam is propagated along the SCL linac using the code Trace Win. A comparison between Trace Win simulations and the beam envelope measured bythe12wirescanners of the SCL linac was performed. Transverse and longitudinal beam parameters at the entrance of the transition section will be reported
Carneiro, Jean-Paul [Fermilab]↗
FNAL SBL Program Status
The Short Baseline Neutrino Program at Fermilab aims at delivering, in the short term, a rich and compelling physics opportunity, including the ability to perform the most sensitive search to date for sterile neutrinos at the eV mass-scale through both appearance and disappearance oscillation channels.It consists of the three liquid argon TPC detectors SBND, MicroBooNE and ICARUS, exposed to the Booster Neutrino Beamline (BNB) at different baselines. Current status and perspectives of the program and the single detectors are hereby presented.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Searching sterile neutrinos with ICARUS at FNAL
The ICARUS T600 detector completed in 2013 a successful three-year physics run at the underground LNGS laboratory and after a significant overhaul at CERN, it has been installed at Fermilab. In June 2022 a new data taking started and ICARUS is presently recording neutrino events from BNB and NuMI off-axis beams. ICARUS aims at first to investigate the claim by Neutrino-4 short-baseline reactor experiment and to perform with the NuMI beam measurements of neutrino cross sections in LAr and several BSM searches. ICARUS will soon jointly search for evidence of sterile neutrinos with the Short-Baseline Near Detector (SBND). In this proceeding the status of the T600 detector and preliminary results from the ICARUS data analysis with the BNB and NuMI beams will be shortly described.
Farnese, Christian [INFN, Padua] (ORCID:0000000163↗
PRELIMINARY TEST RESULTS FROM A TELESCOPE OF HUGHES PIXEL ARRAYS AT FNAL
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Jernigan, J.↗
The Recoil Detector of the FNAL SAS Facility
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Gottschalk, B.↗
The FNAL Booster 2nd Harmonic RF Cavity
A second harmonic RF cavity which uses perpendicularly biased garnet for frequency tuning is currently being constructed for use in the Fermilab Booster. The cavity will operate at twice the fundamental RF frequency, from ~76 - 106 MHz, and will be turned on only during injection, and transition or extraction. Its main purpose is to reduce beam loss as required by Fermilab’s Proton Improvement Plan (PIP). After three years of optimization and study, the cavity design has been finalized and all constituent parts have been received. We discuss the design aspects of the cavity and its associated systems, component testing, and status of the cavity construction.
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E1039 at FNAL: A Polarized Proton Target to Measure the Sivers Asymmetry of Light Sea Quarks
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Kleinjan, David William↗
Development of a Marx Modulator for FNAL Linac
A Marx-topology modulator has been designed and developed at the Fermi National Accelerator Laboratory under the Proton Improvement Plan (PIP). This modulator replaces the previous triode hard-tube design, increasing reliability, lowering operational costs, and maintaining waveform accuracy. The Marx modulator supplies the anode of the 7835 VHF power triode tube with a 35 kV, 375 Amp, 460 μs pulse at 15 Hz. It consists of 54 individual Marx cells, each containing a 639 μF capacitor charged to 900 Volts, combined in series with IGBT switches to create the desired output waveform. This requires variable rise and fall times, flattening of capacitive droop, and feedforward beam loading compensation. All five 201.25 MHz RF systems have been upgraded to Marx modulators to ensure continued operation of the linear accelerator.
43 PARTICLE ACCELERATORS↗
Development of a Marx Modulator for FNAL Linac
A Marx-topology modulator has been designed and developed at the Fermi National Accelerator Laboratory under the Proton Improvement Plan (PIP). This modulator replaces the previous triode hard-tube design, increasing reliability, lowering operational costs, and maintaining waveform accuracy. The Marx modulator supplies the anode of the 7835 VHF power triode tube with a 35 kV, 375 Amp, 460 µs pulse at 15 Hz. It consists of 54 indi-vidual Marx cells, each containing a 639 µF capacitor charged to 900 Volts, combined in series with IGBT switches to create the desired output waveform. This requires variable rise and fall times, flattening of capaci-tive droop, and feedforward beam loading compensation. All five 201.25 MHz RF systems have been upgraded to Marx modulators to ensure continued operation of the linear accelerator.
43 PARTICLE ACCELERATORS↗
Development and Operation of PIP-II Injector Test, SSR1 Cryomodule, 325 MHz Amplifiers
The PIP-II Injector Test (PIP2IT) has successfully accelerated ionized hydrogen up to 17MeV through a superconducting, single spoke resonator (SSR1) cryomodule at Fermi National Accelerator Laboratory (FNAL). Each of the SSR1 cavities is tuned to 325MHz and requires up to 6 kW of RF power to accelerate 2mA of ionized hydrogen at the design gradients. RF power amplifiers, specialized for SRF cavity beam operations, were designed by Bhabha Atomic Research Center (BARC) and constructed in a collaboration between the BARC in Mumbai, India and the Electronics Corporation of India Limited (ECIL) in Hyderabad, India. The RF amplifiers meet the specifications and requirements mutually approved between BARC and FNAL. They operate at 325 MHz with a linear power output of 7 kW in both CW and pulse mode. The amplifiers are compatible with the FNAL accelerator personnel safety system and the cavity protection interlocks. Access to controls and internal diagnostic instrumentation are compatible with EPICS control standards. This paper gives details about RF power amplifier development within the Department of Atomic Energy (DAE), India and the operational details with PIP2IT at FNAL.
43 PARTICLE ACCELERATORS↗
Transportation analysis and related design optimization of the Fermilab high-beta 650 MHz cryomodule
The Proton Improvement Plan-II (PIP-II) at Fermi National Accelerator Laboratory (FNAL) will create a new and vastly improved accelerator, which will be the source of high-energy particles for the experiments taking place at FNAL. The new linear accelerator (LINAC) contains several types of cryomodules, which are individual particle accelerators. The last cryomodule in the LINAC will be the High-Beta 650 (HB650), which will operate at 650 MHz. Each module is approximately 15 meters in length and 1.5 meters wide, weighs 13 tonnes, and shares many design features with three of the other cryomodules. The HB650 consists of two primary sections, the outer vacuum vessel and the components that reside within it, which will be cooled to cryogenic temperatures – the cold mass. Once assembly is complete at FNAL, it will be transported to one of three places: another location at FNAL, another national laboratory within the continental United States, or to a scientific partner in Europe. Any excitation the module experiences, such as going over rough roads when on a semitrailer, can create high stresses in components and cause failure if severe enough. Additionally, any delicate components with low resonant frequencies that match the excitation spectrum could achieve resonance, potentially causing a fatigue failure by repeated flexing. To ensure the successful transportation of the HB650, a transport analysis utilizing ANSYS simulation software has been performed on major subassemblies, as well as analysis of the subassemblies as a combined system. The optimization of components, design of support structures, and overall increasing of the lowest resonant frequencies have resulted in a cryomodule that will be better equipped to handle transportation and any large impact loads that come with it.
43 PARTICLE ACCELERATORS↗
Fermilab-EP Facility Improvements
Electro-chemical Polishing (EP) is one of the key technologies of surface treatments for niobium superconducting cavities. FNAL has established Cold EP method and applied on all single cell cavities (1.3GHz~3.9GHz) processed at FNAL EP facility since 2016. Cold EP method allows to achieve continuous large current oscillations during EP process and provide the uniform removal over the cell with the variation of ±15%. The details of Fermilab EP facility and Cold EP method are presented in this poster. TUP022 Summary • More than 200 EP on over 60 single cell cavities had been successfully performed using Cold EP method at FNAL and helped to achieve high Q, high field, and FE free performances during cryogenic tests of single cell cavities. • Uniform removal over the cell with the variation of ±15% had been achieved by Cold EP method, this is especially important on final removal for doped-cavities. • Cold EP method on 9-cell cavities at ANL EP facility is in progress. • Large EP tool for 1.3GHz 9-cell and 650MHz 5-cell was transferred from AES to FNAL CPL (Cavity Processing lab.) and the re-built work is under discussions. Electrolyte
Furuta, F.↗
Measurement of the positive muon anomalous magnetic moment to 127 ppb
A new measurement of the magnetic anomaly $a_μ$ of the positive muon is presented based on data taken from 2020 to 2023 by the Muon $g-2$ Experiment at Fermi National Accelerator Laboratory (FNAL). This dataset contains over 2.5 times the total statistics of our previous results. From the ratio of the precession frequencies for muons and protons in our storage ring magnetic field, together with precisely known ratios of fundamental constants, we determine $a_μ = 116\,592\,0710(162) \times 10^{-12}$ (139 ppb) for the new datasets, and $a_μ = 116\,592\,0705(148) \times 10^{-12}$ (127 ppb) when combined with our previous results. The new experimental world average, dominated by the measurements at FNAL, is $a_μ(\text{exp}) =116\,592\,0715(145) \times 10^{-12}$ (124 ppb). The measurements at FNAL have improved the precision on the world average by over a factor of four.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗